Map-holder.



P. H. SWANSON.

MAP HOLDER.

APPLICATION FILED Nov.13, 1912.

1,092,607. Patented Apr. 7, 1914.

2 SHEETS-SHEET 1.

F. H. 'SWANSODL MAP HOLDER.

APPLICATION FILED Nov. 1s. 1912.

Patented Apr. '7, 1914 FRANK I-I. SWANSON, 0F CHICAGO, ILLINOIS, ASSIGNOR TO A. J. NYSTROM & COMPANY, A CORPORATION OF ILLINOIS.

MAP-HOLDER.

noaaeov.

To f/.ZZ whom t may concern Be it known that I, FRANK I-I. Swanson, a citizen of the United States, residing at the city of Chicago, in the county of Cook and State of Illinois, have invented a new and useful Improvement in Map-Holders, o-f which the following is a specification.

My invention relates to devices for holding and storing maps where quick and convenient access thereto is required, as in schools, real estate offices, and the like.

The object thereof is to provide a convenient and expansible frame in which a considerable and varying number of maps may be held and secured, and from which they can readily be removed as desired.

My invention in part has special application to map holders inwhich the maps are mounted on automatic rollers of the Hartshorn type, and which are provided with gravity actuated do-gs on the body of the roller to engage with a shaftwithin the roller and secure the two against relative rotation under the impulse of a spring attached to the roller and the shaft. In practice this apparatus is very ineffective as applied to the conditions under which maps are used as when removed from the brackets the dogs frequently become disengaged and the springs thereby untensioned. I therefore provide means by which it is impossible to remove the rollers from the supporting brackets unless the parts are in proper locking relation, and also by which the rollers are secured in the brackets against accidental displacement.

The principles of my invention are illustrated in the drawings, in which Figure l shows a front view of two sections of my device; Fig. 2 is a section of Fig. 1 on the dotted line 2 2. Fig. 3 is a section of Fig. 2 on the'dotted line 3 3; Fig. 4 is a section on the dotted line 4 4 of Fig. 1; Fig. 5 is a detail of the movable locking device; Fig. 6 is an end view of one of the removable rollers; Fig. 7 shows a spring actuated roller, partly in section.

Further describing my invention with reference to the drawings: 1 1 are end pieces attached together by the cross piece 2, to form the frame work of a map holding unit. Within this unit may be mounted two rollers as sho-wn, although one or mo-re may be used if desired. The rollers are of the usual automatic type as, for instance,

Specification of Letters Patent.

Application filed November 13, 19-12.

Patented Apr. 7, 1914. serial No. 731,103.

the wellsknown I-Iartshorn roller, in which a stub shaft 5, having the squared end 5, is revolubly mounted in the wooden body member 6, a spiral spring being attached to said body member and said shaft, dogs 6 o-n the roller being adapted to engage depressions -in the shaft whereby the two may be locked together. To receive the stub shaft I mount on the member l, a convex or outwardly extended bracket 7, cup-shaped on its underside, having a round central opening 8, and a'slot guideway 9, leading thereinto. A locking member 10, is so formed as to fit within the cup-shaped portion of the bracket 7, and is provided with a slot 1l, so placed that when the finger piece 12, is in the position shown in the lower part of Fig. 2, the slot therein will coincide with slot 9, in the bracket, thereby permitting the squared portion 5, of the stub shaftI to pass readily through to its central normal position. lllhen, however, the finger piece 12, is turned into the position shown in the upper portion of Fig. 2, the squared portion of the stub shaft is turned therewith, and securely locked against lateral movement. It will be observed that the pull of the springs on the roller against the body portion of the map tends to hold the squared portion of the stub shaft and with it the locking member 10, in the last described position. IVhenever the map is eX- tended and the shaft and body portion locked together by relative engagement with the dogs, the weight of the map tends to throw the shaft into the position shown. Also when the d ogs are disengaged, thereby rolling up the map to either of the positions shown where the handle strip 13 is in engagement with the end pieces as illustrated in Fig. 1, the pull of the roller spring is eX- erted to turn the locking member so that the slot therein is out of register with the slot 9, in the bracket 7. It will be seen that it is thus practically impossible to disengage the map roller from the bracket unless the dogs are engaged with the stub shaft, thereby preventing the spring from becoming untensioned.

I claim:

l. In a map holder; the combination with a framework anda roller mounted on a shaft movable relatively thereto, of a bracket rigidly attached to the framework having an enlarged central opening with a guideway leading thereto to revolubly receive one end of said shaft, and a locking member on said bracket having a central opening to receive the end of said shaft, and a radial guidevvay, the shaft of said roller being engaged in the locking plate against rotation relatively thereto.

2. In a map holder; the combination With a roller having a stub shaft axially rotatable therein, a spring on the shaft secured thereto and to the roller, and means for securing the roller and shaft against relative rotation; of a stationary bracket having a central opening to revolubly receive the end of the stub shaft and a radial slot leading to said opening, and a device on the bracket adapted to engage the stub shaft against rotation relatively thereto and actuated by the spring whereby the shaft is normally locked in the said bracket against transverse removal.

3. In a map holder; the combination with a roller having a stub shaft with a squared end axially rotatable therein, a spring on the shaft secured thereto and to the roller, and means for securing the roller and shaft against relative rotation; of a slotted bracket adapted revolubly to receive the end of said stub shaft, and a device on the bracket having a slot registrable with the slot in the bracket adapted to receive the squared end of said stub shaft and actuated by the spring so that the slot therein is normally rotated out of register with the slot on the bracket.

4. In a map holder; the combination With a roller having a stub shaft with a squared device being actuated by the spring so'that the slot therein is normally rotated out of register With the slot on the bracket.

In Witness whereof, I have hereunto subscribed my name, this 15th day of October A. D. 1912, in the presence of tWo subscribing Witnesses.

FRANK H'. sWANsoN. Witnesses C. K. CHAMBERLAI, A. PHILLIPS.

Copies of this patent may be obtained for ve cents each, by addressing the Commissioner `of Patents, Washington, ID. C. 

